From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 369272D77F7; Tue, 6 Oct 2026 09:55:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791280518; cv=none; b=nTCaxORxm1Ww/igaX58VMMWtQJJOH8NyxQhLk+4TTgjOY5YtoathzaUJf3IcwfCmjC6PKNH4W8B/XJCDtSsBdOAnTpBm5hC3lDILiYsWYpQB8qzcdv2r0176ryx33Beg+lZY7hUWEK13mC6nzrThR+bF8YgKw9pTKLAl88fHrzM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791280518; c=relaxed/simple; bh=PprG1zoTavpw3blbpMrw2Qfk/deLSjiCWxGPFyBWXnA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QOGhVOXXtMZKThiueiP67bFGXkazVZJyZiUB5ovubLo/MS7rMtZkeOWVl+jYbMvY+H6EhiOrOAvgfff6XdQa588VwX7CWJjrlyd8byxx7EHtUCU//yK6/V18tgTl+M22LSDYYYYy5Avi7FB+nzrBIN+jAu5VcnMvXWcg7v5Pu5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Vm4m60nR; arc=none smtp.client-ip=192.198.163.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Vm4m60nR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1791280517; x=1822816517; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=PprG1zoTavpw3blbpMrw2Qfk/deLSjiCWxGPFyBWXnA=; b=Vm4m60nRU1hndNQ6PgkArjwlgXxENN0vYV5Fve5Hq7kWP5zxKtM+GXvx ru5GRBokloxT6CgWt9TLGKwXqCC1BHvPWH4es0PvprB8D84wQS1RVzVkc h3aZ7Te4GWWotJX3jjiuJ6uVqYQ+ei8eohpJ+A3SWXN7TyAOWkLRQEs/q BlHrkmoN5kaK8Tb0R5fJQzbYfJhRl3n2uPJNdIiVms5PovsCX8b6w5xYy yPoUbt+UPNm6tr/pW0KqOLj/UEVt9X3Z6UB43YoBFk9IuA3JO5TZu8wY2 xPpzXuTsbTWyVD1FllJAMzahfpc2ufU4sg/OH4soEv33rsQH2JgMVGali w==; X-CSE-ConnectionGUID: YE3EgKHJQT+pLNSRGCWkag== X-CSE-MsgGUID: qzKYvbg8SZqrCPBtlJgiLQ== X-IronPort-AV: E=McAfee;i="6800,10657,11926"; a="112880" X-IronPort-AV: E=Sophos;i="6.27,143,1787036400"; d="scan'208";a="112880" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Oct 2026 02:55:17 -0700 X-CSE-ConnectionGUID: 3CvIPXL/Tc2i1GM26q+rSA== X-CSE-MsgGUID: NdjTDoNtQXq0SfBbj3gt+w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,143,1787036400"; d="scan'208";a="285008670" Received: from lkp-server01.sh.intel.com (HELO 0caa9d2d175c) ([10.239.97.150]) by fmviesa003.fm.intel.com with ESMTP; 06 Oct 2026 02:55:13 -0700 Received: from kbuild by 0caa9d2d175c with local (Exim 4.98.2) (envelope-from ) id 1xE1t7-000000001Qi-36dv; Tue, 06 Oct 2026 09:55:09 +0000 Date: Tue, 6 Oct 2026 17:54:53 +0800 From: kernel test robot To: Bradley Morgan , akpm@linux-foundation.org, vgupta@kernel.org, guoren@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com Cc: oe-kbuild-all@lists.linux.dev, arnd@arndb.de, paulmck@kernel.org, david.laight.linux@gmail.com, glaubitz@physik.fu-berlin.de, ysato@users.sourceforge.jp, dalias@libc.org, linux-snps-arc@lists.infradead.org, linux-csky@vger.kernel.org, linux-kernel@vger.kernel.org, brads@mainlining.org Subject: Re: [PATCH v5 3/3] xtensa: Emulate two-byte cmpxchg Message-ID: <202610061704.rvbolgPy-lkp@intel.com> References: <20261005120700.383058-4-brads@mainlining.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261005120700.383058-4-brads@mainlining.org> Hi Bradley, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on vgupta-arc/for-curr jcmvbkbc-xtensa/xtensa-for-next linus/master v7.3-rc6 next-20261005] [cannot apply to vgupta-arc/for-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Bradley-Morgan/ARC-Emulate-two-byte-cmpxchg/20261005-120658 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20261005120700.383058-4-brads%40mainlining.org patch subject: [PATCH v5 3/3] xtensa: Emulate two-byte cmpxchg config: xtensa-allyesconfig (https://download.01.org/0day-ci/archive/20261006/202610061704.rvbolgPy-lkp@intel.com/config) compiler: xtensa-linux-gcc (GCC) 16.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261006/202610061704.rvbolgPy-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202610061704.rvbolgPy-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from arch/xtensa/include/asm/atomic.h:19, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/xtensa/include/asm/bitops.h:192, from include/linux/bitops.h:67, from include/linux/log2.h:12, from kernel/bounds.c:14: arch/xtensa/include/asm/cmpxchg.h: In function '__cmpxchg': >> arch/xtensa/include/asm/cmpxchg.h:79:25: error: implicit declaration of function 'cmpxchg_emu_u16'; did you mean 'cmpxchg_emu_u8'? [-Wimplicit-function-declaration] 79 | case 2: return cmpxchg_emu_u16(ptr, old, new); | ^~~~~~~~~~~~~~~ | cmpxchg_emu_u8 make[3]: *** [scripts/Makefile.build:185: kernel/bounds.s] Error 1 make[3]: Target 'prepare' not remade because of errors. make[2]: *** [Makefile:1405: prepare0] Error 2 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:248: __sub-make] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:248: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +79 arch/xtensa/include/asm/cmpxchg.h 73 74 static __inline__ unsigned long 75 __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) 76 { 77 switch (size) { 78 case 1: return cmpxchg_emu_u8(ptr, old, new); > 79 case 2: return cmpxchg_emu_u16(ptr, old, new); 80 case 4: return __cmpxchg_u32(ptr, old, new); 81 default: __cmpxchg_called_with_bad_pointer(); 82 return old; 83 } 84 } 85 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki